WASHINGTON — Supporters of GOP presidential candidate Ron Paul have filed a lawsuit against the Republican National Committee and nearly every state party claiming they improperly helped Mitt Romney during the primaries while using intimidation and threats of violence to thwart them.

Paul's campaign says the Texas congressman doesn't support the lawsuit. An RNC official called it frivolous.

The lawsuit asks a federal court in California to clarify whether delegates attending the national convention in August can vote for any candidate they choose, even if they were won by Romney. Most state parties require delegates to vote for the candidate who won them in primaries or caucuses.

The lawsuit was filed June 11 by more than 100 people who say they are delegates, though some aren't on lists released by state parties.